能源化学(英文版)

能源化学(英文) ›› 2003, Vol. 12 ›› Issue (3): 167-177.

• Articles • 上一篇    下一篇

CO2 Reforming of CH4 over Ni/CeO2-ZrO2-Al2O3 Prepared by Hydrothermal Synthesis Method

Chunlin Li, Yilu Fu, Guozhu Bian, Tiandou Hu, Yaning Xie, Jing Zhan   

  1. Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;
  • 出版日期:2003-09-30 发布日期:2003-09-30

CO2 Reforming of CH4 over Ni/CeO2-ZrO2-Al2O3 Prepared by Hydrothermal Synthesis Method

Chunlin Li, Yilu Fu, Guozhu Bian, Tiandou Hu, Yaning Xie, Jing Zhan   

  • Online:2003-09-30 Published:2003-09-30

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摘要： The Ni/CeO2-ZrO2-Al2O3 catalyst with di erent Al2O3 and NiO contents were prepared by hydrothermal synthesis method. The catalytic performance for CO2 reforming of CH4 reaction, the interaction among components and the relation between Ni content and catalyst surface basicity were investigated. Results show that the interaction between NiO and Al2O3 is stronger than that between NiO and CeO2-ZrO2. The addition of Al2O3 can prevent the formation of large metallic Ni ensembles, increase the dispersion of Ni, and improve catalytic activity, but excess Al2O3 causes the catalyst to deactivate easily. The interaction between NiO and CeO2 results in more facile reduction of surface CeO2. The existence of a small amount of metallic Ni can increase the number of basic sites. As metallic Ni may preferentially reside on the strong basic sites, increasing Ni content can weaken the catalyst basicity.

关键词: carbon dioxide, reforming, methane, nickel, ceria, zirconia, alumina, hydrothermal synthesis

Abstract: The Ni/CeO2-ZrO2-Al2O3 catalyst with di erent Al2O3 and NiO contents were prepared by hydrothermal synthesis method. The catalytic performance for CO2 reforming of CH4 reaction, the interaction among components and the relation between Ni content and catalyst surface basicity were investigated. Results show that the interaction between NiO and Al2O3 is stronger than that between NiO and CeO2-ZrO2. The addition of Al2O3 can prevent the formation of large metallic Ni ensembles, increase the dispersion of Ni, and improve catalytic activity, but excess Al2O3 causes the catalyst to deactivate easily. The interaction between NiO and CeO2 results in more facile reduction of surface CeO2. The existence of a small amount of metallic Ni can increase the number of basic sites. As metallic Ni may preferentially reside on the strong basic sites, increasing Ni content can weaken the catalyst basicity.

Key words: carbon dioxide, reforming, methane, nickel, ceria, zirconia, alumina, hydrothermal synthesis